Isothermal High-Temperature Oxidation Behaviour of Nickel-Based Superalloy IN740H

被引：1
|
作者：
Singh, R. K. [1 ]
Paswan, S. [2 ]
机构：
[1] Malaviya Natl Inst Technol Jaipur, Jaipur 302017, Rajasthan, India
[2] Natl Met Lab, CSIR, Jamshedpur 831007, India
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2024年 / 77卷 / 05期
关键词：
IN; 740H; High-temperature oxidation; Advanced ultra-supercritical; CYCLE FATIGUE BEHAVIOR; HOT CORROSION; KINETICS; NIMONIC-263; ALLOYS;
D O I：
10.1007/s12666-023-03233-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The isothermal oxidation behaviour of IN740H alloy was studied by conducting experiments in a thermogravimetric analyser in the presence of air and synthetic flue gas in the temperature range of 760-900 degrees C. SEM/XRD/EPMA/Raman spectroscopy was used for analysing surfaces/cross sections of oxidized/corroded specimens. The oxide layer consists of Ti-doped Cr2O3 and NiCr2O4 in air-oxidized specimens, whereas additional NiO and NiS form in the presence of flue gas at 900 degrees C. Alumina forms at the oxide/matrix interface and at 900 degrees C; it was followed by gamma ' denuded zone with dispersed (Ti, Nb)C. The kinetics of oxidation in a steady state are found to be sub-parabolic for all the conditions.
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收藏
页码：1287 / 1297
页数：11
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